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Why could drinking saltwater instead of freshwater be dangerous to humans?
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
Cells use passive and active transport to move materials across the cell membrane to keep a constant internal environment. What is this process called?
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
The cell membrane of a red blood cell will allow water, oxygen, carbon dioxide, and glucose to pass through. Since other substances are blocked from coming in, this membrane is
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
Which of the following is essential for diffusion to occur?
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
What is (are) the main difference(s) between passive transport and active transport?
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
What is known as the net movement of any type of molecule from a region of higher concentration to a region of lower concentration?
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
Which statement is true regarding active transport?
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
In facilitated diffusion, what are the special channels that help substances cross the cell membrane made of?
Saltwater is hypertonic relative to human tissue.
diffusion
a concentration gradient
proteins
homeostasis
Substances can move from areas of low concentration to areas of high concentration
Active transport requires cellular energy for substances to cross the cell membrane; passive transport does not.
semi-permable
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